"""
These are almost end-to-end tests. They create a Prompt, feed it with some
input and check the result.
"""

from __future__ import annotations

from functools import partial

import pytest

from prompt_toolkit.clipboard import ClipboardData, InMemoryClipboard
from prompt_toolkit.enums import EditingMode
from prompt_toolkit.filters import ViInsertMode
from prompt_toolkit.history import InMemoryHistory
from prompt_toolkit.input.defaults import create_pipe_input
from prompt_toolkit.input.vt100_parser import ANSI_SEQUENCES
from prompt_toolkit.key_binding.bindings.named_commands import prefix_meta
from prompt_toolkit.key_binding.key_bindings import KeyBindings
from prompt_toolkit.output import DummyOutput
from prompt_toolkit.shortcuts import PromptSession


def _history():
    h = InMemoryHistory()
    h.append_string("line1 first input")
    h.append_string("line2 second input")
    h.append_string("line3 third input")
    return h


def _feed_cli_with_input(
    text,
    editing_mode=EditingMode.EMACS,
    clipboard=None,
    history=None,
    multiline=False,
    check_line_ending=True,
    key_bindings=None,
):
    """
    Create a Prompt, feed it with the given user input and return the CLI
    object.

    This returns a (result, Application) tuple.
    """
    # If the given text doesn't end with a newline, the interface won't finish.
    if check_line_ending:
        assert text.endswith("\r")

    with create_pipe_input() as inp:
        inp.send_text(text)
        session = PromptSession(
            input=inp,
            output=DummyOutput(),
            editing_mode=editing_mode,
            history=history,
            multiline=multiline,
            clipboard=clipboard,
            key_bindings=key_bindings,
        )

        _ = session.prompt()
        return session.default_buffer.document, session.app


def test_simple_text_input():
    # Simple text input, followed by enter.
    result, cli = _feed_cli_with_input("hello\r")
    assert result.text == "hello"
    assert cli.current_buffer.text == "hello"


def test_emacs_cursor_movements():
    """
    Test cursor movements with Emacs key bindings.
    """
    # ControlA (beginning-of-line)
    result, cli = _feed_cli_with_input("hello\x01X\r")
    assert result.text == "Xhello"

    # ControlE (end-of-line)
    result, cli = _feed_cli_with_input("hello\x01X\x05Y\r")
    assert result.text == "XhelloY"

    # ControlH or \b
    result, cli = _feed_cli_with_input("hello\x08X\r")
    assert result.text == "hellX"

    # Delete.  (Left, left, delete)
    result, cli = _feed_cli_with_input("hello\x1b[D\x1b[D\x1b[3~\r")
    assert result.text == "helo"

    # Left.
    result, cli = _feed_cli_with_input("hello\x1b[DX\r")
    assert result.text == "hellXo"

    # ControlA, right
    result, cli = _feed_cli_with_input("hello\x01\x1b[CX\r")
    assert result.text == "hXello"

    # ControlB (backward-char)
    result, cli = _feed_cli_with_input("hello\x02X\r")
    assert result.text == "hellXo"

    # ControlF (forward-char)
    result, cli = _feed_cli_with_input("hello\x01\x06X\r")
    assert result.text == "hXello"

    # ControlD: delete after cursor.
    result, cli = _feed_cli_with_input("hello\x01\x04\r")
    assert result.text == "ello"

    # ControlD at the end of the input ssshould not do anything.
    result, cli = _feed_cli_with_input("hello\x04\r")
    assert result.text == "hello"

    # Left, Left, ControlK  (kill-line)
    result, cli = _feed_cli_with_input("hello\x1b[D\x1b[D\x0b\r")
    assert result.text == "hel"

    # Left, Left Esc- ControlK (kill-line, but negative)
    result, cli = _feed_cli_with_input("hello\x1b[D\x1b[D\x1b-\x0b\r")
    assert result.text == "lo"

    # ControlL: should not influence the result.
    result, cli = _feed_cli_with_input("hello\x0c\r")
    assert result.text == "hello"

    # ControlRight (forward-word)
    result, cli = _feed_cli_with_input("hello world\x01X\x1b[1;5CY\r")
    assert result.text == "XhelloY world"

    # ContrlolLeft (backward-word)
    result, cli = _feed_cli_with_input("hello world\x1b[1;5DY\r")
    assert result.text == "hello Yworld"

    # <esc>-f with argument. (forward-word)
    result, cli = _feed_cli_with_input("hello world abc def\x01\x1b3\x1bfX\r")
    assert result.text == "hello world abcX def"

    # <esc>-f with negative argument. (forward-word)
    result, cli = _feed_cli_with_input("hello world abc def\x1b-\x1b3\x1bfX\r")
    assert result.text == "hello Xworld abc def"

    # <esc>-b with argument. (backward-word)
    result, cli = _feed_cli_with_input("hello world abc def\x1b3\x1bbX\r")
    assert result.text == "hello Xworld abc def"

    # <esc>-b with negative argument. (backward-word)
    result, cli = _feed_cli_with_input("hello world abc def\x01\x1b-\x1b3\x1bbX\r")
    assert result.text == "hello world abc Xdef"

    # ControlW (kill-word / unix-word-rubout)
    result, cli = _feed_cli_with_input("hello world\x17\r")
    assert result.text == "hello "
    assert cli.clipboard.get_data().text == "world"

    result, cli = _feed_cli_with_input("test hello world\x1b2\x17\r")
    assert result.text == "test "

    # Escape Backspace (unix-word-rubout)
    result, cli = _feed_cli_with_input("hello world\x1b\x7f\r")
    assert result.text == "hello "
    assert cli.clipboard.get_data().text == "world"

    result, cli = _feed_cli_with_input("hello world\x1b\x08\r")
    assert result.text == "hello "
    assert cli.clipboard.get_data().text == "world"

    # Backspace (backward-delete-char)
    result, cli = _feed_cli_with_input("hello world\x7f\r")
    assert result.text == "hello worl"
    assert result.cursor_position == len("hello worl")

    result, cli = _feed_cli_with_input("hello world\x08\r")
    assert result.text == "hello worl"
    assert result.cursor_position == len("hello worl")

    # Delete (delete-char)
    result, cli = _feed_cli_with_input("hello world\x01\x1b[3~\r")
    assert result.text == "ello world"
    assert result.cursor_position == 0

    # Escape-\\ (delete-horizontal-space)
    result, cli = _feed_cli_with_input("hello     world\x1b8\x02\x1b\\\r")
    assert result.text == "helloworld"
    assert result.cursor_position == len("hello")


def test_emacs_kill_multiple_words_and_paste():
    # Using control-w twice should place both words on the clipboard.
    result, cli = _feed_cli_with_input(
        "hello world test\x17\x17--\x19\x19\r"  # Twice c-w.  Twice c-y.
    )
    assert result.text == "hello --world testworld test"
    assert cli.clipboard.get_data().text == "world test"

    # Using alt-d twice should place both words on the clipboard.
    result, cli = _feed_cli_with_input(
        "hello world test"
        "\x1bb\x1bb"  # Twice left.
        "\x1bd\x1bd"  # Twice kill-word.
        "abc"
        "\x19"  # Paste.
        "\r"
    )
    assert result.text == "hello abcworld test"
    assert cli.clipboard.get_data().text == "world test"


def test_interrupts():
    # ControlC: raise KeyboardInterrupt.
    with pytest.raises(KeyboardInterrupt):
        result, cli = _feed_cli_with_input("hello\x03\r")

    with pytest.raises(KeyboardInterrupt):
        result, cli = _feed_cli_with_input("hello\x03\r")

    # ControlD without any input: raises EOFError.
    with pytest.raises(EOFError):
        result, cli = _feed_cli_with_input("\x04\r")


def test_emacs_yank():
    # ControlY (yank)
    c = InMemoryClipboard(ClipboardData("XYZ"))
    result, cli = _feed_cli_with_input("hello\x02\x19\r", clipboard=c)
    assert result.text == "hellXYZo"
    assert result.cursor_position == len("hellXYZ")


def test_quoted_insert():
    # ControlQ - ControlB (quoted-insert)
    result, cli = _feed_cli_with_input("hello\x11\x02\r")
    assert result.text == "hello\x02"


def test_transformations():
    # Meta-c (capitalize-word)
    result, cli = _feed_cli_with_input("hello world\01\x1bc\r")
    assert result.text == "Hello world"
    assert result.cursor_position == len("Hello")

    # Meta-u (uppercase-word)
    result, cli = _feed_cli_with_input("hello world\01\x1bu\r")
    assert result.text == "HELLO world"
    assert result.cursor_position == len("Hello")

    # Meta-u (downcase-word)
    result, cli = _feed_cli_with_input("HELLO WORLD\01\x1bl\r")
    assert result.text == "hello WORLD"
    assert result.cursor_position == len("Hello")

    # ControlT (transpose-chars)
    result, cli = _feed_cli_with_input("hello\x14\r")
    assert result.text == "helol"
    assert result.cursor_position == len("hello")

    # Left, Left, Control-T (transpose-chars)
    result, cli = _feed_cli_with_input("abcde\x1b[D\x1b[D\x14\r")
    assert result.text == "abdce"
    assert result.cursor_position == len("abcd")


def test_emacs_other_bindings():
    # Transpose characters.
    result, cli = _feed_cli_with_input("abcde\x14X\r")  # Ctrl-T
    assert result.text == "abcedX"

    # Left, Left, Transpose. (This is slightly different.)
    result, cli = _feed_cli_with_input("abcde\x1b[D\x1b[D\x14X\r")
    assert result.text == "abdcXe"

    # Clear before cursor.
    result, cli = _feed_cli_with_input("hello\x1b[D\x1b[D\x15X\r")
    assert result.text == "Xlo"

    # unix-word-rubout: delete word before the cursor.
    # (ControlW).
    result, cli = _feed_cli_with_input("hello world test\x17X\r")
    assert result.text == "hello world X"

    result, cli = _feed_cli_with_input("hello world /some/very/long/path\x17X\r")
    assert result.text == "hello world X"

    # (with argument.)
    result, cli = _feed_cli_with_input("hello world test\x1b2\x17X\r")
    assert result.text == "hello X"

    result, cli = _feed_cli_with_input("hello world /some/very/long/path\x1b2\x17X\r")
    assert result.text == "hello X"

    # backward-kill-word: delete word before the cursor.
    # (Esc-ControlH).
    result, cli = _feed_cli_with_input("hello world /some/very/long/path\x1b\x08X\r")
    assert result.text == "hello world /some/very/long/X"

    # (with arguments.)
    result, cli = _feed_cli_with_input(
        "hello world /some/very/long/path\x1b3\x1b\x08X\r"
    )
    assert result.text == "hello world /some/very/X"


def test_controlx_controlx():
    # At the end: go to the start of the line.
    result, cli = _feed_cli_with_input("hello world\x18\x18X\r")
    assert result.text == "Xhello world"
    assert result.cursor_position == 1

    # At the start: go to the end of the line.
    result, cli = _feed_cli_with_input("hello world\x01\x18\x18X\r")
    assert result.text == "hello worldX"

    # Left, Left Control-X Control-X: go to the end of the line.
    result, cli = _feed_cli_with_input("hello world\x1b[D\x1b[D\x18\x18X\r")
    assert result.text == "hello worldX"


def test_emacs_history_bindings():
    # Adding a new item to the history.
    history = _history()
    result, cli = _feed_cli_with_input("new input\r", history=history)
    assert result.text == "new input"
    history.get_strings()[-1] == "new input"

    # Go up in history, and accept the last item.
    result, cli = _feed_cli_with_input("hello\x1b[A\r", history=history)
    assert result.text == "new input"

    # Esc< (beginning-of-history)
    result, cli = _feed_cli_with_input("hello\x1b<\r", history=history)
    assert result.text == "line1 first input"

    # Esc> (end-of-history)
    result, cli = _feed_cli_with_input(
        "another item\x1b[A\x1b[a\x1b>\r", history=history
    )
    assert result.text == "another item"

    # ControlUp (previous-history)
    result, cli = _feed_cli_with_input("\x1b[1;5A\r", history=history)
    assert result.text == "another item"

    # Esc< ControlDown (beginning-of-history, next-history)
    result, cli = _feed_cli_with_input("\x1b<\x1b[1;5B\r", history=history)
    assert result.text == "line2 second input"


def test_emacs_reverse_search():
    history = _history()

    # ControlR  (reverse-search-history)
    result, cli = _feed_cli_with_input("\x12input\r\r", history=history)
    assert result.text == "line3 third input"

    # Hitting ControlR twice.
    result, cli = _feed_cli_with_input("\x12input\x12\r\r", history=history)
    assert result.text == "line2 second input"


def test_emacs_arguments():
    """
    Test various combinations of arguments in Emacs mode.
    """
    # esc 4
    result, cli = _feed_cli_with_input("\x1b4x\r")
    assert result.text == "xxxx"

    # esc 4 4
    result, cli = _feed_cli_with_input("\x1b44x\r")
    assert result.text == "x" * 44

    # esc 4 esc 4
    result, cli = _feed_cli_with_input("\x1b4\x1b4x\r")
    assert result.text == "x" * 44

    # esc - right (-1 position to the right, equals 1 to the left.)
    result, cli = _feed_cli_with_input("aaaa\x1b-\x1b[Cbbbb\r")
    assert result.text == "aaabbbba"

    # esc - 3 right
    result, cli = _feed_cli_with_input("aaaa\x1b-3\x1b[Cbbbb\r")
    assert result.text == "abbbbaaa"

    # esc - - - 3 right
    result, cli = _feed_cli_with_input("aaaa\x1b---3\x1b[Cbbbb\r")
    assert result.text == "abbbbaaa"


def test_emacs_arguments_for_all_commands():
    """
    Test all Emacs commands with Meta-[0-9] arguments (both positive and
    negative). No one should crash.
    """
    for key in ANSI_SEQUENCES:
        # Ignore BracketedPaste. This would hang forever, because it waits for
        # the end sequence.
        if key != "\x1b[200~":
            try:
                # Note: we add an 'X' after the key, because Ctrl-Q (quoted-insert)
                # expects something to follow. We add an additional \r, because
                # Ctrl-R and Ctrl-S (reverse-search) expect that.
                result, cli = _feed_cli_with_input("hello\x1b4" + key + "X\r\r")

                result, cli = _feed_cli_with_input("hello\x1b-" + key + "X\r\r")
            except KeyboardInterrupt:
                # This exception should only be raised for Ctrl-C
                assert key == "\x03"


def test_emacs_kill_ring():
    operations = (
        # abc ControlA ControlK
        "abc\x01\x0b"
        # def ControlA ControlK
        "def\x01\x0b"
        # ghi ControlA ControlK
        "ghi\x01\x0b"
        # ControlY (yank)
        "\x19"
    )

    result, cli = _feed_cli_with_input(operations + "\r")
    assert result.text == "ghi"

    result, cli = _feed_cli_with_input(operations + "\x1by\r")
    assert result.text == "def"

    result, cli = _feed_cli_with_input(operations + "\x1by\x1by\r")
    assert result.text == "abc"

    result, cli = _feed_cli_with_input(operations + "\x1by\x1by\x1by\r")
    assert result.text == "ghi"


def test_emacs_selection():
    # Copy/paste empty selection should not do anything.
    operations = (
        "hello"
        # Twice left.
        "\x1b[D\x1b[D"
        # Control-Space
        "\x00"
        # ControlW (cut)
        "\x17"
        # ControlY twice. (paste twice)
        "\x19\x19\r"
    )

    result, cli = _feed_cli_with_input(operations)
    assert result.text == "hello"

    # Copy/paste one character.
    operations = (
        "hello"
        # Twice left.
        "\x1b[D\x1b[D"
        # Control-Space
        "\x00"
        # Right.
        "\x1b[C"
        # ControlW (cut)
        "\x17"
        # ControlA (Home).
        "\x01"
        # ControlY (paste)
        "\x19\r"
    )

    result, cli = _feed_cli_with_input(operations)
    assert result.text == "lhelo"


def test_emacs_insert_comment():
    # Test insert-comment (M-#) binding.
    result, cli = _feed_cli_with_input("hello\x1b#", check_line_ending=False)
    assert result.text == "#hello"

    result, cli = _feed_cli_with_input(
        "hello\rworld\x1b#", check_line_ending=False, multiline=True
    )
    assert result.text == "#hello\n#world"


def test_emacs_record_macro():
    operations = (
        "  "
        "\x18("  # Start recording macro. C-X(
        "hello"
        "\x18)"  # Stop recording macro.
        "  "
        "\x18e"  # Execute macro.
        "\x18e"  # Execute macro.
        "\r"
    )

    result, cli = _feed_cli_with_input(operations)
    assert result.text == "  hello  hellohello"


def test_emacs_nested_macro():
    "Test calling the macro within a macro."
    # Calling a macro within a macro should take the previous recording (if one
    # exists), not the one that is in progress.
    operations = (
        "\x18("  # Start recording macro. C-X(
        "hello"
        "\x18e"  # Execute macro.
        "\x18)"  # Stop recording macro.
        "\x18e"  # Execute macro.
        "\r"
    )

    result, cli = _feed_cli_with_input(operations)
    assert result.text == "hellohello"

    operations = (
        "\x18("  # Start recording macro. C-X(
        "hello"
        "\x18)"  # Stop recording macro.
        "\x18("  # Start recording macro. C-X(
        "\x18e"  # Execute macro.
        "world"
        "\x18)"  # Stop recording macro.
        "\x01\x0b"  # Delete all (c-a c-k).
        "\x18e"  # Execute macro.
        "\r"
    )

    result, cli = _feed_cli_with_input(operations)
    assert result.text == "helloworld"


def test_prefix_meta():
    # Test the prefix-meta command.
    b = KeyBindings()
    b.add("j", "j", filter=ViInsertMode())(prefix_meta)

    result, cli = _feed_cli_with_input(
        "hellojjIX\r", key_bindings=b, editing_mode=EditingMode.VI
    )
    assert result.text == "Xhello"


def test_bracketed_paste():
    result, cli = _feed_cli_with_input("\x1b[200~hello world\x1b[201~\r")
    assert result.text == "hello world"

    result, cli = _feed_cli_with_input("\x1b[200~hello\rworld\x1b[201~\x1b\r")
    assert result.text == "hello\nworld"

    # With \r\n endings.
    result, cli = _feed_cli_with_input("\x1b[200~hello\r\nworld\x1b[201~\x1b\r")
    assert result.text == "hello\nworld"

    # With \n endings.
    result, cli = _feed_cli_with_input("\x1b[200~hello\nworld\x1b[201~\x1b\r")
    assert result.text == "hello\nworld"


def test_vi_cursor_movements():
    """
    Test cursor movements with Vi key bindings.
    """
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)

    result, cli = feed("\x1b\r")
    assert result.text == ""
    assert cli.editing_mode == EditingMode.VI

    # Esc h a X
    result, cli = feed("hello\x1bhaX\r")
    assert result.text == "hellXo"

    # Esc I X
    result, cli = feed("hello\x1bIX\r")
    assert result.text == "Xhello"

    # Esc I X
    result, cli = feed("hello\x1bIX\r")
    assert result.text == "Xhello"

    # Esc 2hiX
    result, cli = feed("hello\x1b2hiX\r")
    assert result.text == "heXllo"

    # Esc 2h2liX
    result, cli = feed("hello\x1b2h2liX\r")
    assert result.text == "hellXo"

    # Esc \b\b
    result, cli = feed("hello\b\b\r")
    assert result.text == "hel"

    # Esc \b\b
    result, cli = feed("hello\b\b\r")
    assert result.text == "hel"

    # Esc 2h D
    result, cli = feed("hello\x1b2hD\r")
    assert result.text == "he"

    # Esc 2h rX \r
    result, cli = feed("hello\x1b2hrX\r")
    assert result.text == "heXlo"


def test_vi_operators():
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)

    # Esc g~0
    result, cli = feed("hello\x1bg~0\r")
    assert result.text == "HELLo"

    # Esc gU0
    result, cli = feed("hello\x1bgU0\r")
    assert result.text == "HELLo"

    # Esc d0
    result, cli = feed("hello\x1bd0\r")
    assert result.text == "o"


def test_vi_text_objects():
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)

    # Esc gUgg
    result, cli = feed("hello\x1bgUgg\r")
    assert result.text == "HELLO"

    # Esc gUU
    result, cli = feed("hello\x1bgUU\r")
    assert result.text == "HELLO"

    # Esc di(
    result, cli = feed("before(inside)after\x1b8hdi(\r")
    assert result.text == "before()after"

    # Esc di[
    result, cli = feed("before[inside]after\x1b8hdi[\r")
    assert result.text == "before[]after"

    # Esc da(
    result, cli = feed("before(inside)after\x1b8hda(\r")
    assert result.text == "beforeafter"


def test_vi_digraphs():
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)

    # C-K o/
    result, cli = feed("hello\x0bo/\r")
    assert result.text == "helloø"

    # C-K /o  (reversed input.)
    result, cli = feed("hello\x0b/o\r")
    assert result.text == "helloø"

    # C-K e:
    result, cli = feed("hello\x0be:\r")
    assert result.text == "helloë"

    # C-K xxy (Unknown digraph.)
    result, cli = feed("hello\x0bxxy\r")
    assert result.text == "helloy"


def test_vi_block_editing():
    "Test Vi Control-V style block insertion."
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)

    operations = (
        # Six lines of text.
        "-line1\r-line2\r-line3\r-line4\r-line5\r-line6"
        # Go to the second character of the second line.
        "\x1bkkkkkkkj0l"
        # Enter Visual block mode.
        "\x16"
        # Go down two more lines.
        "jj"
        # Go 3 characters to the right.
        "lll"
        # Go to insert mode.
        "insert"  # (Will be replaced.)
        # Insert stars.
        "***"
        # Escape again.
        "\x1b\r"
    )

    # Control-I
    result, cli = feed(operations.replace("insert", "I"))

    assert result.text == "-line1\n-***line2\n-***line3\n-***line4\n-line5\n-line6"

    # Control-A
    result, cli = feed(operations.replace("insert", "A"))

    assert result.text == "-line1\n-line***2\n-line***3\n-line***4\n-line5\n-line6"


def test_vi_block_editing_empty_lines():
    "Test block editing on empty lines."
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)

    operations = (
        # Six empty lines.
        "\r\r\r\r\r"
        # Go to beginning of the document.
        "\x1bgg"
        # Enter Visual block mode.
        "\x16"
        # Go down two more lines.
        "jj"
        # Go 3 characters to the right.
        "lll"
        # Go to insert mode.
        "insert"  # (Will be replaced.)
        # Insert stars.
        "***"
        # Escape again.
        "\x1b\r"
    )

    # Control-I
    result, cli = feed(operations.replace("insert", "I"))

    assert result.text == "***\n***\n***\n\n\n"

    # Control-A
    result, cli = feed(operations.replace("insert", "A"))

    assert result.text == "***\n***\n***\n\n\n"


def test_vi_visual_line_copy():
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)

    operations = (
        # Three lines of text.
        "-line1\r-line2\r-line3\r-line4\r-line5\r-line6"
        # Go to the second character of the second line.
        "\x1bkkkkkkkj0l"
        # Enter Visual linemode.
        "V"
        # Go down one line.
        "j"
        # Go 3 characters to the right (should not do much).
        "lll"
        # Copy this block.
        "y"
        # Go down one line.
        "j"
        # Insert block twice.
        "2p"
        # Escape again.
        "\x1b\r"
    )

    result, cli = feed(operations)

    assert (
        result.text
        == "-line1\n-line2\n-line3\n-line4\n-line2\n-line3\n-line2\n-line3\n-line5\n-line6"
    )


def test_vi_visual_empty_line():
    """
    Test edge case with an empty line in Visual-line mode.
    """
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)

    # 1. Delete first two lines.
    operations = (
        # Three lines of text. The middle one is empty.
        "hello\r\rworld"
        # Go to the start.
        "\x1bgg"
        # Visual line and move down.
        "Vj"
        # Delete.
        "d\r"
    )
    result, cli = feed(operations)
    assert result.text == "world"

    # 1. Delete middle line.
    operations = (
        # Three lines of text. The middle one is empty.
        "hello\r\rworld"
        # Go to middle line.
        "\x1bggj"
        # Delete line
        "Vd\r"
    )

    result, cli = feed(operations)
    assert result.text == "hello\nworld"


def test_vi_character_delete_after_cursor():
    "Test 'x' keypress."
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)

    # Delete one character.
    result, cli = feed("abcd\x1bHx\r")
    assert result.text == "bcd"

    # Delete multiple character.s
    result, cli = feed("abcd\x1bH3x\r")
    assert result.text == "d"

    # Delete on empty line.
    result, cli = feed("\x1bo\x1bo\x1bggx\r")
    assert result.text == "\n\n"

    # Delete multiple on empty line.
    result, cli = feed("\x1bo\x1bo\x1bgg10x\r")
    assert result.text == "\n\n"

    # Delete multiple on empty line.
    result, cli = feed("hello\x1bo\x1bo\x1bgg3x\r")
    assert result.text == "lo\n\n"


def test_vi_character_delete_before_cursor():
    "Test 'X' keypress."
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI, multiline=True)

    # Delete one character.
    result, cli = feed("abcd\x1bX\r")
    assert result.text == "abd"

    # Delete multiple character.
    result, cli = feed("hello world\x1b3X\r")
    assert result.text == "hello wd"

    # Delete multiple character on multiple lines.
    result, cli = feed("hello\x1boworld\x1bgg$3X\r")
    assert result.text == "ho\nworld"

    result, cli = feed("hello\x1boworld\x1b100X\r")
    assert result.text == "hello\nd"

    # Delete on empty line.
    result, cli = feed("\x1bo\x1bo\x1b10X\r")
    assert result.text == "\n\n"


def test_vi_character_paste():
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)

    # Test 'p' character paste.
    result, cli = feed("abcde\x1bhhxp\r")
    assert result.text == "abdce"
    assert result.cursor_position == 3

    # Test 'P' character paste.
    result, cli = feed("abcde\x1bhhxP\r")
    assert result.text == "abcde"
    assert result.cursor_position == 2


def test_vi_temp_navigation_mode():
    """
    Test c-o binding: go for one action into navigation mode.
    """
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)

    result, cli = feed("abcde" "\x0f" "3h" "x\r")  # c-o  # 3 times to the left.
    assert result.text == "axbcde"
    assert result.cursor_position == 2

    result, cli = feed("abcde" "\x0f" "b" "x\r")  # c-o  # One word backwards.
    assert result.text == "xabcde"
    assert result.cursor_position == 1

    # In replace mode
    result, cli = feed(
        "abcdef"
        "\x1b"  # Navigation mode.
        "0l"  # Start of line, one character to the right.
        "R"  # Replace mode
        "78"
        "\x0f"  # c-o
        "l"  # One character forwards.
        "9\r"
    )
    assert result.text == "a78d9f"
    assert result.cursor_position == 5


def test_vi_macros():
    feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)

    # Record and execute macro.
    result, cli = feed("\x1bqcahello\x1bq@c\r")
    assert result.text == "hellohello"
    assert result.cursor_position == 9

    # Running unknown macro.
    result, cli = feed("\x1b@d\r")
    assert result.text == ""
    assert result.cursor_position == 0

    # When a macro is called within a macro.
    # It shouldn't result in eternal recursion.
    result, cli = feed("\x1bqxahello\x1b@xq@x\r")
    assert result.text == "hellohello"
    assert result.cursor_position == 9

    # Nested macros.
    result, cli = feed(
        # Define macro 'x'.
        "\x1bqxahello\x1bq"
        # Define macro 'y' which calls 'x'.
        "qya\x1b@xaworld\x1bq"
        # Delete line.
        "2dd"
        # Execute 'y'
        "@y\r"
    )

    assert result.text == "helloworld"


def test_accept_default():
    """
    Test `prompt(accept_default=True)`.
    """
    with create_pipe_input() as inp:
        session = PromptSession(input=inp, output=DummyOutput())
        result = session.prompt(default="hello", accept_default=True)
        assert result == "hello"

        # Test calling prompt() for a second time. (We had an issue where the
        # prompt reset between calls happened at the wrong time, breaking this.)
        result = session.prompt(default="world", accept_default=True)
        assert result == "world"
